UFile (package = )
    UClass (name = ParametersWithDefaultValuesKt)
        UMethod (name = foo)
            UParameter (name = a)
            UParameter (name = b)
            UParameter (name = c)
                [!] UnknownKotlinExpression (INTEGER_CONSTANT)
            UParameter (name = flag)
                [!] UnknownKotlinExpression (BOOLEAN_CONSTANT)
            [!] UnknownKotlinExpression (BLOCK)
